Samuel b



s. B. RAWSON GUI-OUT AND AGITATOR-l-"OR DUST TRANSMITTERS FOR TELEPHONES. No. 578,771. Patented Mar. 16,1897.

Tm: NDRms mks'ou, PHOTO-LUNG. WASHINGTON. a c.

UNITE STATES PATENT CFFICE.

SAMUEL B. RAVVSON, OF ELYRIA, CHIC, ASSIGNOR TO THE RAWSON ELECTRIC COMPANY, OF SAME PLACE.

CUT-OUT AND AGITATDR FOR DUST-TRANSMlTTERS FOR TELEPHONES.

SPECIFICATION forming part of Letters Patent No. 578,771, dated March 16, 1897. A lication fil d June 14,1895. Serial No. 552,799. (No man.)

T 0 all whom it may concern.-

Be it known that I, SAMUEL B. RAWSON, a citizen of the United States,-residing at Ely ria, in the county of Lorain and State of Ohio,have

' invented a new and useful Device for Agitatin g the Dust in Dust-Transmitters for Telephones and Cutting Out and In the Batteries and Bells Connected Therewith, of which the following is a specification.

My invention relates to a new and novel combination and construction of parts with a jointed arm, switches, and connections, to the outer end of which arm is attached a d ust-transmitter with properconnections and switches, whereby in the use and operation of said dust-transmitter the dust in the same is agitated and the batteries and bells are out out and in, as is more fully hereinafter set forth; and the object of my invention is to provide a simple and convenient device which will accomplish the results above specified and form a convenient receiver-hook.

I attain the object of my invention by means of the mechanism illustrated in the accompanying drawings, in which- Figure '1 is a side view showing the application of my invention to an ordinary dust-transmitter with its connecting parts; and Fig. 2 is an enlarged view of the jointed arm, more fully showing the details of its construction. Fig. 3 is a diagram illustrating the circuits and connections.

Similar letters refer to similar parts throughout the several views.

A represents the ordinary backboard to a telephone, B the bell-box with electricbells, and C the battery-box, all of which are of the ordinary form and construction, but can be modified to suit any convenience.

or represents a jointed arm, the inner end of which is attached to the backboard by any suitable means, and to the outer end of this arm is attached a dust-transmitter a, and to this transmitter is attached the battery-wire a. On the outer end of this jointed arm and on the lower side, when in the position shown by dotted lines in Fig. 1, the next to the joint, is a projection or lip b. Below the inner end of the jointed arm and attached to the backboard is the fiexible finger b, and connected with the battery-circuit wire Z), and so adjusted that when the outer end of the arm a is lowered and in the position shown by (lot ted lines in Fig. 1 connection is made to the outer end of the'finger b by engaging with the projection or lip Z7 and the battery-circuit through the arm and transmitter thereby formed and completed, and the transmitter is then in positionrand condition for transmitting sound.

a c are two spring-fingers, one connected with the bell-coils and the other with the line by the wires 0 c, and are of such a distance apart that they will admit of the introduction between them of the outer end of the arm a and then slightly impinge against said arm,

thereby completing the circuit through the arm with the bells, by means of which the bells are cut in and may be rung in the ordinary manner. YVhen the outer end of the arm a is thrown up between fingers c c, the

connection between the finger b and lip b is severed.

h is a hook for holding the receiver when the outer edge of the arm a is thrown up. The connections with the battery-bells and receiver may all be of the usual form.

The operation of myinvention is as follows: I11 order to make acall or ring the bells, it is necessary that the outer end of the arm a, carrying the transmitter, be swung up between the fingers c 0, thereby completing the circuit for the bells, and in order to transmit sound the arm must be brought down until a connection is formed between I) and b. The changing of the position of the outer end of the arm a from one position to the other likewise changes the position of the transmitter accordingly, and the dust therein contained is thereby agitated and disturbed and its position changed, and thereby prevented from becoming packed.

Having fully described my invention and its operations, what I desire to secure by Letters Patent of the United States is 1. In a telephone, the dust-transmitter on a jointed arm, a battery-wire connected to said arm and movable therewith, the bell connections having fingers in position to be engaged and thrown into circuit by said arm in one position, and the transmitter having a finger connected to the battery-circuit and in posithe battery-circuit connected to said arm and [o transmitter, and the dust-transmitter carried by said arm, all combined and arranged substantially as described.

SAMUEL B. RAWSON.

\Vitnesses:

E. C. MANTER, N. F. MANNVILLE. 

